Filtering or like device



April 15, y'1930.

H. A. THOMPSON l FILTERING dR LIKE DEVICE Filed Feb, '14, 1929 2A Sheets-Sheet l April l5, 1930. i H. A. THOMPSON 1,754,728

FILTERING 0R' LIKE DEVICE Filed Feb. 14, 1929 2 Sheets-Sheet 2 g4\ 20 2/ l i; :l 25 Z Patented Apr. 15, 1930 l UNITED .STATES MP Ari-:NT osFFozicE HERBERT ALEXANDER THOMPSON, F MORPETH, ENGLAND, `ASSIGrNOB OF ONE-HALF `TO SWINNEY BROTHERS LIMITED, OF MORPETI-I, llNGrIiAliIlD., A CORPORATION" OF GREAT BRITAIN i Application filed February 14, 1929,`Sera1 No. 339,976, and in 'Great Britain ITaniiary 17,4 1929.

This invention relates `to ltering or like devicesof the kind wherein the filtering medium consists of spacedco-aXialannular laminations adapted `for rotation as a whole 5 about their common axis; scraper elements,

-arranged to extend into the spaces between 'the laminations, being secured on a spindle parallel to the axis of the laminations, and

means interconnecting the spindle and laminations beingk arranged to provide synchronous rocking or rotation. There may be two or more parallel spindles, preferably disposedsymmetrically with respect tothe axis of thelaininations.

Such yfiltering kdevices are` described and claimedin fthe specification accompanying my co-pending application No. 332,076 and the `present invention is an improvement vin or modicationoi the invention set `forth `in this said specification.

. similarly-mounted scraper elements.

Alternatively, the laminations may besupported withoutthe use of a main spindle and provided with peripheral teeth, either internally f or externally, and the scraper `elements eolortheir spindles with pinions co-acting with `the teeth of the Aappropriate laminations. The laminations may then lbe continuously rotated. When two or more sets ofscraper elements, lsecured to symmetrically-disposed .parallel spindles are used, whether internally lor externally of the laminations, thelamina- 1 tions are automatically maintainedvco-axial. `The employment of a fixed, `longitudinal C like scraper, engaging the lines of intersec tionofthe laminations and scraper elements, will assist this centrin The centring may be furtherassistedbyt e provision ofilo'ngitudinal roller elements adjacent to the laminations against `their untoothed edges. When only one set of scraper elementsion a common `spindle is used,I must use some aligning means, such as the Yfixed C-like scraper or the roller elements.

Preferably `the filtering device is arranged 50 Vso rthat `the laminations lie horizontally, a

4edly while a particular filter is being examined,rcleaned or repaired.

When two Vor Amore scraper spindles are used, these may be ]ournalled in the-end assenibly plates "for the laminations, and spring washers may be disposed `between collars on the spindles and one of the end plates tobias the laminations towards one another. If the C-like scraper is securedin positionby means o'f-a bar'or rod `connected tothe end plates, the' bar is preferably adjustably connected to one of "the end plates to allow-ofthe spring washers operating to maintain the assembly in a state of compression. The same Aprinciple applies to the connection of the roller elements, iii' used.

The present invention consists in provid- `ing means whereby the subsidiary spindleor spindles on which the scraper elements are mounted is-or are iirmly supported in bearings, preferably at each end.

In carrying Vout `the invention one of lthe assembly plates of the laminations, preferablylthe top one, 'which provides a bearing ifor one `endof the scraper spindle(s), may

be iirrnly clamped against rotation. Ifftlie other assembly plate is "to belusedjto lprovide the `bearing at the otherend of the scraper spindle(s) it may convenientlybe keyed or otherwisesecured tothe main casing so that it is unable to rotate but able `to slide axially as necessary in accordance withtlie `compression ofthe laminated structure. I prefer, however, to prolong the scraper spindle(s) beyondthe other end vplate and lto receive the end of the saine in an appropriate socket or sockets provided in one ofthe cover-plates of the main casing. In this lattercase, when `the annular laminations are mounted on a vmain -spindle and the `subsidiary orscraper spindles are disposed -internallyfofthe laminations, the main spindle. may be irolonged., for example, at its lower end, an provided with a-crank or other stop which, on ,the rotation of the main spindle, will engage a subsidia spindle or a fixed part of the casing and t us limit the rocking to-and-fro of the main spindle and prevent a possible fracture.

For a better understanding of the invention, reference should be directed to the following description taken in connection with the accompanying drawings, in Which:-

Fig. 1 is a vertical section through a filter according to the invention.

Fig. 2 is a half-sectional plan thereof, the section being taken on the line 2-2 of Fig. 1.

ig. 3 is a section taken on the line 3-3 of Fig. 1.

The drawing shows a vertical tubular casing 6 having top and bottom cover-plates 7 and 8 respectively secured thereto by bolts. The laminated structure 9 is disposed within the casing 6 between the top and bottom end plates 10 and 11, respectively.

With this arrangement the fiow of liquid during a filtering operation is from the inlet passage 12, to the annular space 13 between the laminated structure 9 and the casing 6, radially inward through the laminations, and up through the interior of the laminations through holes 14 in the top end plate 10 to the outlet passage 15.

In this arrangement the annular laminations 16, 16 are slidably mounted on the main spindle 17 to rotate therewith. The handle 18 is provided for rotating or rocking the main spindle, which has secured to it the internally-toothed pinion 19. The main spindle is journalled in the top and bottom end plates 10 and 11.

There are here shown two subsidiary spindles 20, 20 disposed on opposite sides of the main spindle and extending through the top and bottom end plates 10 and 11. These spindles carry the scraper discs 21, 21 as above described, which are interposed between the annular laminations 16, 16. To the upper ends of the subsidiary spindles are secured the pinions 22, 22 each gearing with the gear wheel 19.

Loosely carried by the end plates 10 and 11 are the C-like fixed scraper elements 23, 23 having knife-like edges 24, 24 directed towards the edges of the scraper discs 21, 21 where they emerge from the annular laminations 16, 16.

The two end plates are biased towards one another to subject the laminated structure 9 to a suitable compression by means of the spring washers 25, 25.

In the present instance the top end plate 10 is shown as being firmly clamped between the top cover-plate 7 and the main body of the casing 6, as by means of the bolts by which the top cover-plate is secured. The clamping i of the top end plate 10 in this manner ro vides a firm bearing for the upper ends o the subsidiary spindles 20, 20. The lower end plate 11 is not firmly anchored, and therefore the spindles 20, 20 are prolonged at 26, 26 to take into sockets 27, 27 in shoulders or ribs 28, 28 provided in the bottom cover-plate 8, so that the subsidiary spindles and the whole structure 9 are firmly held against lateral movement; journalled at each end.

In the arrangement illustrated the subsidiary spindles pass internally of the laminations, and these latter are mounted on the main spindle, so that the main spindle can be rocked to-and-ro but not fully rotated. 29 represents a stop mounted on the lower end of the main spindle, the same engaging the extensions 26, 26 as the main spindle is rocked to-and-fro to its maximum extent.

The manner in which the filter is operated, and in which the present invention can be applied to duplex, outflow, and other filters of the kind aforesaid, will readily be understood, it is believed, from a consideration of the specification of United States Patent #1,719,346.

What I claim as my invention, and desire to secure by Letters Patent is l. In a filter device, the combination of a plurality of annular laminations spaced along a main spindle, said laminations being movable axially of but rotatable with said main spindle, a subsidiary parallel spindle mounted internally of said laminations in fixed bearings, scraper elements which are movable axially on said subsidiary spindle but rotatable therewith, said scraper elements being arranged to extend into the spaces between said laminations, means applying a suitable tension to the assembly of laminations and scraper elements, and means interconnecting said spindles to provide synchronous rotational movement thereof.

2. In a filter device, the combination of a plurality of annular laminations spaced along and rotatable with a main spindle, said laminations forming a cylindrical chamber provided with peripheral openings, means closing one end of said chamber, a subsidiary parallel spindle mounted internally of Said laminations in fixed bearings, scraper discs carried on the subsidiary spindle and rotatable therewith, said scraper discs, extending into the peripheral openings between said laminations, and means interconnecting said spindles to provide synchronous rotational movement thereof.

3. In a filter device, the combination of a plurality of annular laminations spaced along and rotatable with a main spindle, said laminations forming a cylindrical chamber provided with openings, means closing one end of said chamber, subsidiary parallel spindles mounted internally of said laminations in fixed bearings, scraper discs carried on the subsidiary spindles, said scraper discs extending into the spaces between said laminations, means interconnecting said spindles to provide synchronous rotational movement thereof, and plates at the ends of the assembly of laminations and scraper elements through which said spindles extend, the plate nearest to said interconnecting means being fixed, and fixed means at the other end of said assembly in which said subsidiary spindles are journalled.

4. In a filter, the combination of an outer stationary casing, an end closure therefor, a stationary slotted plate secured transversely within said casing adjacent 'said end closure, a vertically disposed shaft journalled centrally in the aforesaid end closure and the aforesaid stationary plate, a plurality of spindles journalled in said stationary plate, an unsecured plate through which the centrally disposed shaft and spindles project,collars at the respective ends of the spindles, springwashers interposed between the collars at one end of each of the spindles and the unsecured plate, a spring washer between a collar on the centrally disposed spindle and unsecured plate, an end closure adjacent said unsecured plate having sockets to receive projecting ends of said spindles, non-revoluble scrapers firmly attached to said unsecured plate but movable lengthwise in the aforesaid stationary plate, an arm projecting from said collar on the centrally disposed shaft to constitute a stop, laminations on said centrally disposed shaft, between said stationary and unsecured plates, scraper discs on said spindles between said stationary and unsecured plates and means for imparting motion in a rotary direction to the centrally disposed shaft and adj acent spindles.

HERBERT ALEXANDER THOMPSON. 

